47712209 has 2 divisors, whose sum is σ = 47712210. Its totient is φ = 47712208.

The previous prime is 47712199. The next prime is 47712227. The reversal of 47712209 is 90221774.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33814225 + 13897984 = 5815^2 + 3728^2 .

It is a cyclic number.

It is not a de Polignac number, because 47712209 - 2²⁰ = 46663633 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (47712229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23856104 + 23856105.

It is an arithmetic number, because the mean of its divisors is an integer number (23856105).

Almost surely, 2^47712209 is an apocalyptic number.

It is an amenable number.

47712209 is a deficient number, since it is larger than the sum of its proper divisors (1).

47712209 is an equidigital number, since it uses as much as digits as its factorization.

47712209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 47712209 is about 6907.4024785009. The cubic root of 47712209 is about 362.6963413571.

The spelling of 47712209 in words is "forty-seven million, seven hundred twelve thousand, two hundred nine".